Bobbin guide



V. LINDSJO BOBBIN GUIDE June 19, 1934.

Filed Sept. 28, 1933 INVENTOR'.

VEE/YEK Lwos .10,

W/T/VESS.

62mm 6 CQBUEN,

ATTORNEY.

Patented June 19, 1934 BOBBIN GUIDE Verner Lindsjo, Hopedale, Mass., assignor to Draper Corporation, Hopedale, Mass, a corporation of Maine Application September 28, 1933, Serial No. 691,372

4 Claims.

The present invention pertains to replenishing mechanisms of bobbin changing looms and has more particular reference to the bobbin guiding devices thereof.

It is usual practice, in looms of the type mentioned, to provide a hopper which successively presents the bobbins therein to a position direct- 1y over the running shuttle, from whence the bobbins are transferred automatically to the shuttle. Transferring position of the bobbins is usually determined by a stop member, called a bobbin guide, which also serves to guide the bobbin during the actual transferring operation. It has been proposed to mount the bobbin guide so that it yieldingly bears against the bobbin next to be transferred, to thereby assist in holding such bobbin up in its proper position in the hopper pending transfer. However, such devices have not proven entirely satisfactory in that their resilient character is not conducive to proper guiding of the bobbin during transfer.

Accordingly, it is the object of my invention to provide a bobbin guide which is constructed to yieldingly engage the bobbin in transfer position to hold the same in place in the hopper, but which shall positively and correctly guide the bobbin during transfer.

The preferred embodiment of my invention is illustrated on the accompanying drawing, of which:

Fig. 1 is a fragmentary elevation, partly in section, of the rotary hopper to which my invention has been applied;

Fig. 2 is a detail of the bobbin guide and certain continguous parts; and

Fig. 3 is an elevation of the bobbin guide detached from its support.

Referring to the drawing, a hopper stand 1, adapted to be mounted on a loom in the usual 40 manner, carries a shaft 2 upon which is mounted a rotary disc 3 and certain other parts not shown. The disc is provided about its periphery with a series of pockets 4, 4 for holding reserve bobbins 5, 5. The hopper is rotated clockwise Fig. 1, by a suitable feed pawl 6 and hold-back pawl 7 which are operated by the transferrer 8 and which act upon ratchet disc 9. The transferrer is actuated by a hunter 10 on the lay 11, which bunter engages dog 12 on the transferrer at the proper time, thereby causing the transferrer head 13 and fork 14 to drive the bobbin down into the shuttle 15 and eject the spent bobbin 16 through the bottom of the shuttle box 17. As the bobbins 5 approach transfer position 5' they may be supported by a usual bobbin supporting device such as 18.

The mechanism as thus far described is not of my invention, being old and well knownin the art. As will become apparent, other hopper and transferring mechanisms may be employed.

The position of the bobbin 5', next to be transferred is determined by the hold back pawl '7 and the bobbin guide, to be described. 'If there be a sli ht lost motion in the hopper feed devices the hopper may oscillate slightly, from the vibration of the loom, and the bobbin 5" may drop down slightly and may be vibrated until it turns around and slackens, or tightens, the filling end projecting therefrom. 4

The bobbin guide of my invention is constructed to prevent vibration of the hopper, and to prevent the bobbin next to be transferred from dropping down out of position and turning as stated. To this end the bobbin guide is comprised of a member 19 which is fixed to the hopper stand as by rivets (not shown) passing through countersunk holes 20, 20 in the member.

An arm 21 projects upwardly from the member 19 and is provided with a face 22. The face 22, instead of being on an arc conforming to the path of movement of the transferrer head 13 as is usual, is preferably straight and more nearly Vertical.

A leaf spring 23 is fixed at its lower end to 3 the member 19 as by a screw or screws 24, and is bent into contact with the lower end of the stop face 22. The spring is bowed intermediate its ends into contact with the bobbin 5' next to be transferred. That is, from the point of contact with the lower end of face 22 the spring extends at 25 upwardly and rearwardly away from the face to a point just below and in front of the center of the bobbin 5' and thence upwardly and forwardly at 26 in yielding engagement with said bobbin.

The extreme upper end of the spring may be bent forwardly and downwardly in front of the arm 21, as at 27, to limit rearward movement of the spring when no bobbin 5 is present.

It will be noted, Fig. 1, that while the hopper and transferrer are idle, awaiting a call for replenishment, the spring bears rearwardly and slightly upwardly against the bobbin 5' thus tending to rotate the hopper backwardly against the hold-back pawl 7. Such action of the spring not only tends to prevent vibration of the hopper but also causes the bobbin 5 to frictionally engage the side of its pocket 4 whereby the bobbin is prevented from dropping down or turning.

The beneficial action of the spring is attained while still providing for the proper guiding of the bobbin during transfer. It will be noted that during the transfer, Fig. 2, the transferrer forces the bobbin against the spring and causes the latter, in a sense, to pivot about its point of contact with the lower end of the face 22. This may bring the upper portion of the spring against the face, but in any event, as the bobbin leaves the bobbin guide and enters the shuttle it is guided by the rigidly backed lower portion of the spring and will most surely be in proper position to enter the shuttle.

Having fully disclosed the preferred embodiment of my invention, I claim:

1. In a bobbin changing loom, the combination of a rotary bobbin holding hopper adapted to successively present the bobbins contained therein for transfer, with a bobbin guide positioned to engage the bobbin next to be transferred and to guide the same during the trans ferring operation; said bobbin guide being comprised ofga rigid member having an approximately verticalvface and a bobbin guiding spring positioned between said faceand the said bobbin next to be transferred, said spring contacting said face at the lower end of the latter and extending upwardly and outwardly away therefrom into yielding contact with said bobbin.

ferring operation; said bobbin guide including a bobbin guiding spring fixed at its lower end and extending therefrom upwardly and rearwardly to a point below and in front of the said bobbin next to be transferred, and thence upwardly and forwardly into yielding engagement with said bobbin, and a stop member forwardly of said spring for limiting forward movement of the latter. V

3. A bobbin guide for the hopper of bobbin changing looms, said bobbin guide being comprised of a rigid member adapted to be fixed to the hopper, said member having an upwardly projecting arm provided with an approximately vertical face, and a bobbin guiding spring fixed at its lower end to said member and free at its upper end, said spring contacting the lower end of said face and extending thence upwardly and rearwardly away from the latter whereby said 'face serves as a stop to limit forward movement of the said free end of the spring. I

4. A bobbin guide for the hopper of bobbin changing looms, said bobbin guide being comprised of a rigid member adapted to be fixed to the hopper, said member having an upwardly' projecting arm provided with an approximately vertical face, and a bobbin guiding spring fixed at its lower end to said member and free at its upper end, said spring being bowed rearwardly intermediate its ends to provide a bobbin engaging portion which is spaced rearwardly from said face, the spring contacting the lower end of said face and yielding about such point of contact.

VERNER LINDSJO. 

